Current sensing relay
US5004954A · kind A · utility
1Cited by
8References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1989 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Dec 21, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H1/242
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A three pole relay which operates in response to the flow of normal operating current across fluorescent lamps to activate a coil, the coil coperating a relay to open switches disposed in all of the filament lines associated with the lamp to shut off filament current while maintaining current flow across the lamps themselves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.